Radiance Vitamin B12 Drops is a water-soluble vitamin that our bodies are not able to produce, so it is essential that we receive it from our diet. It plays a vital role in the production of red blood cells and nerve cells and healthy levels support optimum energy levels, brain health and mental focus. Vitamin B12 is not found naturally in plant foods and is especially important for vegans, vegetarians, pregnant and breastfeeding women, or for those with low levels of vitamin B12.